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Letters Patent No. 90,488, dated May 25, 1869.

IMPROVEMENT IN PLOW-CLEARER The Schedule referred to inthese Letters Patent and making part of the same.

To all whom tt may concern:

Be it known that I, ANDREW C. BLACK, of Kaukeuna', in the county of Outegfnnie, in the State of Wisconsin, have invented en Improved Plow-Clezn'er; and I dohereby decla-re the following ,to be at full and correct description of the same, reference being had to the accompanying drawing, which is e side elevation of a plow, with my improved clearer nttziched.

The invention consists in e plow-clearer, formed oi' e lever, pivoted to the plow-beam, in front of the coulter, and operated by a cord, counterected by e spring, its rangeof movement being controlled by at stop, all es hereinafter set forth.

In the accompanying drawing- A marks the lplow-boem, to which the clearer L is pivoted, by the pin 11.

To the upper end of the clearer is attached the cord o, which is carried back to the plow-handle H, so es to be under control of the person driving the plow.

A spiral, or other spring, D, attached to the plowhandle, or to any convenient part of the frame, is connected by cord e with the lower end of the clearer- L, and tends, by its reaction, to draw that end up into a. horizontalposition, es shown.

When grass, trash, or any obstructing metter accumulates in the :ingle between the beam A and conlter C, the driver of the plow jerks the cord c, un

. til the lever L is drnwn up into im' upright posit-ion,

shown in red dotted lines in the figure, when the back of the clearer L comes into contact with the stop B, attached to the top of the beem,zn1d the clearer is arrested in`its backward movement. v

This :Lotion throws the accumulated metter'out on one side, :md clean-s the plow.

The cord c is then released, when the spring D restores the clearer to its original horizontal position.

Having thus fnlly described my invention,

What I claim, and desire to secure by Letters Pet ent, is-

The combination and arrangement of the lever L, cord o, spring D, cord e, and stop B, in the manner and for the purpose described.V

The above specification of my said invention, signed and witnessed at Washington, this 24th day of April,A

ANDREW C. BLACK.

Witnesses: CHAS. C. WILSON,

CHAs. F. STANSBURY. 

